JP2002040441A - Method for manufacturing liquid crystal display device, liquid crystal device and electronic appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid crystal device by which the cell gap is made uniform and the display quality can be improved. SOLUTION: A spacer 21 having specified particle size distribution and adhesive particles 24 having a specified average particle size larger than the average particle size of the spacer 21 and having specified particle size distribution are sprayed with the respective spray densities on the surface of a substrate 11. Then the substrate 11 and a counter substrate 12 are laminated with a sealing material 14A not hardened to form a liquid crystal cell 10A. Then after the liquid crystal cell 10A is pressed externally on the outside of the substrate 11 and the counter substrate 12, or while the liquid crystal cell 10A is externally pressed on the substrate 11 and the counter substrate 12, the liquid crystal cell 10A is heated to specified temperature and then cooled to normal temperature so that the height of the adhesive particles 24 is rendered almost equal to the diameter of the spacer 21 and that the substrate 11 and the counter substrate are fixed adherently by the adhesive particles 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a liquid crystal device, a liquid crystal device, and an electronic apparatus, and more particularly, to uniforming a cell gap of a liquid crystal device when manufacturing a liquid crystal device using a plastic film substrate. About technology.

[0002]

2. Description of the Related Art The structure of a conventional simple matrix type liquid crystal (display) device 100 using a plastic film substrate will be described with reference to FIGS. FIG.
Is a schematic sectional view of the liquid crystal device 100, and FIG.
FIG. 2 is a schematic plan view when 0 is viewed from the upper substrate side. Note that FIG. 17 illustrates the liquid crystal device 100 as A10-A1 in FIG.
It is sectional drawing at the time of cutting along the 0 'line.

[0003] First, based on FIG.
The cross-sectional structure of No. 0 will be described.

As shown in FIG. 17, a substrate (lower substrate) 101 made of a plastic film substrate and an opposing substrate (upper substrate) 102 are adhered to each other at predetermined intervals via a sealing material 104 at the periphery of each substrate. And the substrate 10
1. A liquid crystal layer 103 is sandwiched between opposed substrates 102. Electrodes 105 and 106 are formed in stripes on the surfaces of the substrate 101 and the counter substrate 102 on the liquid crystal layer 103 side, respectively.
07 and 108 are formed.

In the liquid crystal device 100, the electrodes 105, 1
06 are formed to cross each other. A large number of spherical spacers 109 made of silicon dioxide, resin or the like are arranged between the alignment films 107 and 108 to make the cell gap of the liquid crystal cell uniform. Although not shown, optical elements such as a polarizing plate and a retardation plate are attached outside the substrate 101 and the counter substrate 102.

Next, the planar structure of the liquid crystal device 100 will be described with reference to FIG.

[0007] As shown in FIG.
A substantially annular shape is formed between the peripheral portions of the substrate 101 and the counter substrate 102, and an injection hole 110 for injecting liquid crystal is formed in a part thereof. From the injection hole 110 to the substrate 10
1. After the liquid crystal is injected between the opposing substrates 102, the injection hole 110 is sealed by a sealing material 111.

The internal structures of the substrate 101 and the counter substrate 102 of the liquid crystal device 100 will be briefly described. Substrate 1
01, the counter substrate 102 is made of a transparent organic polymer such as polycarbonate, polyacrylate, polyethersulfone, polyolefin, or polyethylene terephthalate, and has a thickness of 0.4 × 10 ⁻³ m (0.4 mm) or less. And a gas barrier layer that does not allow gas permeation and a protective layer are laminated on both sides of the plastic film.

By using a plastic film substrate having such a structure as the substrate 101 and the counter substrate 102, there is an advantage that the liquid crystal device 100 can be reduced in size and weight.

Next, a method for manufacturing the above-described liquid crystal device 100 will be briefly described.

An electrode 105 and an orientation film 107 are sequentially formed on the surface of the substrate 101, and an electrode 106 and an orientation film 108 are also sequentially formed on the surface of the counter substrate 102. Next, of the substrate 101 and the counter substrate 102, an uncured sealing material is printed on a peripheral portion of one of the substrates, and a spacer 109 is sprayed on the surface of the same substrate or the other substrate. A liquid crystal cell is formed by attaching the substrate 101 and the counter substrate 102 with a sealant interposed therebetween.
Thereafter, the sealing material 104 is formed by curing the uncured sealing material of the liquid crystal cell.

Next, a liquid crystal layer 103 is formed by injecting liquid crystal into the liquid crystal cell from the injection hole 110, and then the injection hole 110 is sealed with a sealing material 111. Finally, optical elements such as a retardation plate and a polarizing plate are attached to the outside of the substrate 101 and the counter substrate 102, and the liquid crystal device 100 is manufactured.

[0013]

The above liquid crystal device 100
In the manufacturing method, the sealing material 111 is formed by applying a thermosetting adhesive or a photocurable adhesive to the inside and the outside of the injection hole 110 so that the injection hole 110 is sealed.
In order to completely seal 10 and uniform the cell gap of the liquid crystal cell, the liquid crystal cell is heated from the outside of the substrate 101 and the counter substrate 102 while the adhesive is cured by heating or irradiation with ultraviolet rays. Is formed.

As described above, in the step of forming the sealing material 111, the adhesive is cured while the liquid crystal cell is pressed from the outside of the substrate 101 and the counter substrate 102, so that the inside of the liquid crystal cell is exposed to ambient air at normal pressure. Also has a low negative pressure.

Since the plastic film substrate is inferior in gas barrier properties as compared with glass or the like, when the inside of the liquid crystal cell is in a negative pressure state, the air in the outside air having a higher pressure than the inside of the liquid crystal cell forms the substrate 101 and the counter substrate 102. Gradually penetrating,
Dissolves in the liquid crystal layer 103. As a result, after a long period of time, such as several years, bubbles are generated in the liquid crystal layer 103,
The display quality of the liquid crystal device 100 may be degraded.

Although the above problem can be prevented by reducing the pressure applied to the liquid crystal cell when forming the sealing material 111, the pressure applied to the liquid crystal cell when forming the sealing material 111 is reduced. In this case, the injection hole 110 may not be completely sealed, and the cell gap of the liquid crystal cell may be distributed.

It is known that when a distribution occurs in the cell gap of a liquid crystal cell, the display performance of a liquid crystal device deteriorates. In particular, in an STN (Super Twisted Nematic) mode liquid crystal device, it is known that the light transmittance changes due to a change in the value of Δn · d (where Δn is the birefringence of liquid crystal and d is the cell gap). If the change in the value of Δn · d, that is, the distribution of the cell gap d is large, a distribution occurs in the light transmittance, that is, the brightness, so that the contrast decreases,
There is a problem that color unevenness occurs and display quality deteriorates.

In order to solve the above problem, in the process of manufacturing the liquid crystal device, when the spacers 109 are dispersed, a thermosetting adhesive or a thermoplastic resin having an average particle size larger than the average particle size of the spacers 109 is used. After spraying adhesive particles made of an adhesive, and bonding the substrate 101 and the counter substrate 102 via an uncured sealing material to form a liquid crystal cell, when curing the uncured sealing material, or In another step, by heating the liquid crystal cell to a predetermined temperature and lowering the temperature while pressing the liquid crystal cell from the outside of the substrate 101 and the counter substrate 102, the adhesive particles are once melted, and then cured or solidified. The height of the adhesive particles is made substantially equal to the diameter of the spacer 109, and the substrate 101 and the counter substrate 102 are bonded and fixed via the adhesive particles. A method of manufacturing a liquid crystal device for injecting has been proposed.

According to this method, the substrate 101 and the counter substrate 102 are adhered and fixed by the adhesive particles even when the liquid crystal cell is pressed when the sealing material 111 is formed.
Negative pressure inside the liquid crystal cell can be prevented.

However, until now, the optimum conditions for spraying the spacer and the adhesive particles have not been found.
Even if both the spacers and the adhesive particles are sprayed, the cell gap of the liquid crystal device cannot be made uniform, or bubbles may be generated in the liquid crystal layer 103 to deteriorate the display quality.

For example, when the adhesive particles are once melted and then cured or solidified, the adhesive particles shrink,
When the adhesive particles having a large average particle diameter are used, the shrinkage ratio also increases, and thus the cell gap in the vicinity of the adhesive particles of the manufactured liquid crystal device sometimes becomes non-uniform.

Further, for example, since the thermal expansion coefficient of the liquid crystal is different from that of the spacer and the adhesive particles, -3
At a low temperature of about 0 to −20 ° C., a gap (vacuum portion) is generated in the liquid crystal layer 103 due to a lower shrinkage rate of the spacer and the adhesive particles than a shrinkage rate of the liquid crystal. The inside becomes negative pressure, and as a result, the air in the outside air enters the liquid crystal cell and dissolves in the liquid crystal layer 103, and bubbles are generated in the liquid crystal layer 103, thereby deteriorating the display quality. there were.

The above problems are remarkable in a liquid crystal device of a simple matrix type using a plastic film substrate, but are of a two-terminal type such as a TFD (Thin Film Diode) element and a three-terminal type such as a TFT element. This is a problem that occurs in any liquid crystal device using a plastic film substrate, such as an active matrix type liquid crystal device using elements.

Accordingly, the present invention solves the above-mentioned problems and optimizes the conditions for dispersing the spacers and the adhesive particles, thereby making the cell gap uniform even when manufacturing a liquid crystal device using a plastic film substrate. It is an object of the present invention to provide a method of manufacturing a liquid crystal device which can prevent bubbles from being generated in a liquid crystal layer at a low temperature and improve display quality.

It is another object of the present invention to provide a liquid crystal device and an electronic apparatus having excellent display quality by the method of manufacturing a liquid crystal device.

[0026]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have conducted studies and as a result, have found optimum conditions for spraying spacers and adhesive particles. In addition, the grounds for the optimum conditions for spraying the spacer and the adhesive particles found by the present inventors will be described in detail in Examples.

A first means taken by the present invention to solve the above-mentioned problem is that a first substrate and a second substrate, which are opposed to each other with a liquid crystal layer interposed therebetween, are disposed at a predetermined interval with a sealing material interposed therebetween. A method of manufacturing a liquid crystal device which is attached and includes a spacer and adhesive particles made of a thermosetting adhesive or a thermoplastic adhesive between the first substrate and the second substrate. A step of spraying the spacer having a predetermined particle size distribution on a surface of the first substrate at a predetermined spray density; and an average particle diameter of the spacer on the surface of the first substrate. Dispersing the adhesive particles having a predetermined average particle size larger than a predetermined particle size distribution at a predetermined distribution density, and sealing the seal on a surface of the first substrate or the second substrate. Forming a material and bonding the spacer and the spacer on a surface A step of forming a liquid crystal cell by sticking the first substrate and the second substrate on which the liquid crystal has been scattered through the sealing material, and pressing the liquid crystal cell from outside the liquid crystal cell, Making the height of the adhesive particles substantially equal to the diameter of the spacer, heating the liquid crystal cell to a predetermined temperature, and lowering the temperature, so that the first substrate and the first substrate are interposed through the adhesive particles. Bonding and fixing the substrate to the second substrate.

In order to solve the above-mentioned problems, a second means taken by the present invention is that a first substrate and a second substrate, which are opposed to each other with a liquid crystal layer interposed therebetween, are fixed to each other via a sealing material. The first substrate and the second substrate are attached at intervals.
A method for manufacturing a liquid crystal device, comprising: a spacer and an adhesive particle made of a thermosetting adhesive or a thermoplastic adhesive between the first substrate and the first substrate. Spraying the spacer having a diameter distribution at a predetermined spray density, and having a predetermined average particle diameter larger than the average particle diameter of the spacer on the surface of the first substrate, Dispersing the adhesive particles having a predetermined distribution density, forming the sealing material on a surface of the first substrate or the second substrate, and disposing the spacer and the adhesive particles on a surface. Adhering the first substrate and the second substrate on which the liquid has been sprayed through the sealing material to form a liquid crystal cell; and pressing the liquid crystal cell from outside the liquid crystal cell at a predetermined temperature. By heating to lower the temperature, The height of Chakuryushi well as substantially equal to the diameter of said spacer, characterized by a step of adhering and fixing the said second substrate and said first substrate through the adhesive particles.

In the first and second means, in the step of spraying the spacer, the spray density of the spacer is set to 50 × 10 ^{6 to} 200 × 10 ⁶ pieces / m.
² (50-200 pieces / mm ² ), more preferably 100
× 10 ^{6 to} 200 × 10 ⁶ pieces / m ² (100 to 200
Pieces / mm ² ).

In the step of spraying the spacer, the particle size distribution (CV value) of the spacer is 6%.
Hereafter, more preferably, it is 3% or less.

Further, in the step of spraying the adhesive particles, the spray density of the adhesive particles is set to 10 × 10 ^{6 to} 200
× 10 ⁶ / m ² (10 to 200 / mm ² ), more preferably 50 × 10 ^{6 to} 150 × 10 ⁶ / m ² (50
To 150 / mm ² ).

In the step of spraying the adhesive particles, the adhesive particles having an average particle diameter of 1.1 to 3 times, more preferably 1.5 to 2.5 times the average particle diameter of the spacer. Is used.

Further, in the step of dispersing the adhesive particles, a particle having a particle size distribution (CV value) of 20% or less, more preferably 10% or less, is used as the adhesive particles.

The above means is particularly effective when the first substrate and the second substrate are each made of a plastic film as a base material.

By optimizing the conditions for dispersing the spacer and the adhesive particles as described above, the present inventor can make the cell gap uniform even when manufacturing a liquid crystal device using a plastic film substrate. It has been found that it is possible to provide a method for manufacturing a liquid crystal device that can prevent generation of bubbles in a liquid crystal layer at a low temperature and can improve display quality.

Further, according to the method of manufacturing a liquid crystal device of the present invention described above, there is provided a liquid crystal device in which two substrates opposed to each other with a liquid crystal layer interposed therebetween are adhered at a predetermined interval via a sealing material. , Disposed at a predetermined density between the two substrates,
To provide a liquid crystal device comprising: a large number of spacers having a predetermined particle size distribution; and a large number of adhesive particles made of a thermosetting adhesive or a thermoplastic adhesive arranged at a predetermined density. This liquid crystal device has a uniform cell gap, prevents generation of bubbles in the liquid crystal layer at a low temperature, and has excellent display quality.

Further, by providing this liquid crystal device, an electronic device having excellent display quality can be provided.

[0038]

Next, an embodiment according to the present invention will be described in detail.

The structure of the simple matrix type liquid crystal device 10 according to the embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a schematic sectional view of the liquid crystal device 10, FIG. 2 is a schematic plan view when the liquid crystal device 10 is viewed from the upper substrate side,
FIG. 3 is a schematic plan view showing the structure of the lower substrate of the liquid crystal device 10, and FIG. 4 is a schematic plan view showing the structure of the upper substrate of the liquid crystal device 10.

FIG. 1 shows the liquid crystal device 10 as shown in FIGS.
FIG. 3 is a cross-sectional view taken along line A1-A1 ′ of FIG. In FIGS. 1 to 4, the scale of each layer and each member is different from the actual scale in order to make each layer and each member have a size that can be recognized in the drawings.

1, 3 and 4, the display area (pixel area) of the liquid crystal device 10 is indicated by reference numeral 30. In the liquid crystal device 10, a region outside the display region 30 is a non-display region.

First, the sectional structure of the liquid crystal device 10 will be described with reference to FIG.

As shown in FIG. 1, a substrate (lower substrate) 11 composed of a plastic film substrate and a counter substrate (upper substrate) 12 are formed by a thermosetting adhesive and a photocurable adhesive at the peripheral edge of each substrate. A liquid crystal layer 13 is adhered between the substrate 11 and the counter substrate 12 at predetermined intervals via a sealing material 14 made of an agent or the like.

In the liquid crystal device 10, the substrate 11 and the counter substrate 12 are made of polycarbonate, polyacrylate,
A plastic film having a thickness of 0.4 × 10 ⁻³ m (0.4 mm) or less made of a transparent organic polymer such as polyethersulfone, polyolefin, or polyethylene terephthalate is used as a base material. And a protective layer formed by laminating a gas barrier layer that does not transmit the gas.

On the surface of the substrate 11 on the liquid crystal layer 13 side,
At least in the display area 30, a color filter 15 composed of a red (R), green (G), and blue (B) coloring layer 15A and a light shielding layer (black matrix) 15B arranged in a predetermined pattern is formed. I have.

On the surface of the color filter 15, a protective film 16 made of an organic film or the like for protecting the color filter 15 is formed. On the surface of the protection film 16, a plurality of electrodes 17 made of indium tin oxide or the like are formed in a stripe shape. On the surface of the electrode 17, an alignment film 19 made of polyimide or the like for aligning the liquid crystal is formed.

On the surface of the counter substrate 12 on the liquid crystal layer 13 side, a plurality of electrodes 18 made of indium tin oxide or the like are formed at least in the display region 30 in a stripe shape, and polyimide or the like is formed on the surface of the electrodes 18. Is formed.

In the liquid crystal device 10, the electrodes 17 and 18 are formed so as to cross each other. Also, electrode 1
One end of each of the wirings 7 and 18 has a wiring 17a to be described later,
18a is connected.

In the liquid crystal device 10, the alignment film 1
Numerous spherical spacers 21 made of silicon dioxide, resin or the like are arranged between 9 and 20 to make the cell gap of the liquid crystal cell uniform. Also, the alignment films 19 and 20
In the meantime, in order to make the cell gap of the liquid crystal cell uniform and to bond and fix the substrate 11 and the opposing substrate 12,
A large number of adhesive particles 24 made of a thermosetting adhesive or a thermoplastic adhesive are arranged.

In this embodiment, the density of the spacers 21 is 50 × 10 ⁶ to 200 × 10 ⁶ pieces / m ² (50 to ²
00 pieces / mm ² ), more preferably 100 × 10 ^{6 to} 20
Desirably, the density is 0 × 10 ⁶ pieces / m ² (100 to 200 pieces / mm ² ). The particle size distribution (CV value) of the spacer 21 is desirably 6% or less, and more desirably 3% or less. The CV value is calculated by dividing the standard deviation of the particle size distribution by the average value of the particle size distribution.

In this embodiment, the adhesive particles 24
Has a density of 10 × 10 ⁶ to 200 × 10 ⁶ pieces / m ² (10
２００200 / mm ² ), more preferably 50-150 ×
It is desirable that the number be 10 ⁶ pieces / m ² (50 to 150 pieces / mm ² ).

Optical elements such as a retardation plate and a polarizing plate are formed outside the substrate 11 and the counter substrate 12.
It is omitted in the drawings.

Next, a schematic plan structure of the liquid crystal device 10 will be described with reference to FIG.

As shown in FIG. 2, the sealing material 14 is formed in a substantially annular shape between the peripheral portions of the substrate 11 and the counter substrate 12, and an injection hole 22 for injecting liquid crystal is formed in a part thereof. Have been. Substrate 11, counter substrate 12 from injection hole 22
After the liquid crystal is injected therebetween, the injection hole 22 is sealed by a sealing material 23.

Next, based on FIG. 3 and FIG.
The planar structure of the counter substrate 12 will be described in detail.

As shown in FIGS. 3 and 4, the outer peripheral portions of the substrate 11 and the counter substrate 12 are non-display areas, and the inner side thereof is the display area 30. Outside the display area 30, the sealing material 14 is provided on the periphery of the substrate 11 and the counter substrate 12.
Are formed, but are omitted in the drawings for simplicity.

The electrodes 17 and 18 formed in the display area 30
Are provided at one end thereof with wirings 17a and 18a, respectively.
Is connected. The routing wirings 17 a and 18 a are provided on the surfaces of the substrate 11 and the counter substrate 12 outside the display area 30 (that is, in the non-display area).

As shown in FIG. 3, the routing wiring 17a is formed on the surface of the substrate 11 in a lower area of the display area 30 in the drawing. The area where the wiring 17a is formed is referred to as a wiring area 32. On the other hand, as shown in FIG. 4, the wiring 18 a is formed on the surface of the counter substrate 12 in two regions on the left side and the right side of the display area 30 in the drawing. The area where the wiring 18a is formed is referred to as wiring areas 31a and 31b.

The electrodes 17 and 18 are respectively connected to the wiring 1
It is connected to an external connection terminal via 7a and 18a. Since the process of mounting the liquid crystal device 10 on an electronic device is facilitated, it is preferable that the external connection terminal portion is provided only on the surface of one substrate.

As an example, a case where the external connection terminal portion is provided only on the surface of the substrate 11 will be described. As shown in FIG. 3, an external connection terminal 35 for the lower electrode (17) is provided at the center of the end of the substrate 11, and an external connection terminal 36 for the upper electrode (18) is provided on both sides thereof. Since the upper electrode external connection terminal portion 36 corresponds to the routing wiring regions 31a and 31b, it is provided in two places.

The wiring 17a is connected to the external connection terminal 35 for the lower electrode, and the electrode 17 is connected to the external connection terminal 35 via the wiring 17a. on the other hand,
The routing wiring 18a is connected to a conductive member 34 provided between the substrate 11 and the counter substrate 12. Conductive member 34
Corresponds to the routing wiring areas 31a and 31b,
It is provided in two places. The conductive member 34 is made of a conductive material made of conductive particles obtained by coating a plastic ball with nickel or the like and a binder (a thermosetting resin, a photocurable resin, or the like). The conductive member 34 is provided on the surface of the substrate 11. External electrode terminal portion 36 for upper electrode
Is electrically connected to the The electrode 18 is a wiring 18
a, it is connected to the external connection terminal portion 36 via the conductive member 34; Note that the conductive member 34 may be provided inside the seal member 14 or may be provided independently of the seal member 14.

Next, a method for manufacturing the liquid crystal device 10 will be described with reference to FIGS. 5 (a) and 5 (b).

First, a light-shielding layer 15B having a predetermined pattern is formed on the surface of the substrate 11 by a photolithography method, and then a colored layer 15A having a predetermined pattern is formed by a pigment dispersion method or a dyeing method. To form Next, on the surface of the color filter 15,
A protective film 16 made of an organic film or the like is formed.

Next, an electrode material such as indium tin oxide is formed on the surface of the protective film 16 by a sputtering method, a CVD method, or the like, and the formed electrode material is formed into a predetermined pattern by a photolithography method. Thus, the electrode 17 is formed. Further, an alignment film 19 made of polyimide or the like is formed on the surface of the electrode 17.

On the other hand, the electrodes 18 are also provided on the surface of the counter substrate 12.
And an alignment film 20 are sequentially laminated. The method for forming the electrode 18 and the alignment film 20 is the same as the method for forming the electrode 17 and the alignment film 19, respectively.

Next, the substrate 1 on which the alignment films 19 and 20 are formed
1. An uncured sealing material 14A made of a thermosetting adhesive, a photo-curing adhesive, or the like is printed on a peripheral portion of one of the opposing substrates 12.

On the surface of the substrate on which the uncured sealing material 14A is printed or on the other substrate, a large number of spherical spacers 21 made of silicon dioxide, resin, or the like, having a predetermined particle size distribution are sprayed. A thermosetting adhesive having a predetermined average particle size larger than the average particle size of the spacers 21, a predetermined particle size distribution, and a hardness lower than the hardness of the spacers 21. Alternatively, a large number of spherical adhesive particles 24 made of a thermosetting adhesive are sprayed at a predetermined spray density. In the present embodiment, the spacers 21 and the adhesive particles 24 are dispersed on at least an arbitrary position in the display area 30 on the surface of the substrate.

Next, the substrate 11 and the opposing substrate 12 are arranged so as to oppose each other via the uncured sealing material 14A, the spacer 21 and the adhesive particles 24 so that the alignment films 19 and 20 oppose each other. The liquid crystal cell 10 is adhered to the substrate 12 via an uncured sealing material 14A.
Form A.

The uncured sealing material 14 is placed on the surface of the substrate 11.
A, for example, in a case where the spacers 21 and the adhesive particles 24 are scattered on the surface of the substrate 11, a liquid crystal formed by sticking the substrate 11 and the counter substrate 12 through the uncured sealing material 14A. FIG. 5A shows a schematic sectional structure of the cell 10A.

Here, the spacer 21 and the adhesive particles 24
Will be described.

In this embodiment, the application density of the spacer 21 is set to 50 × 10 ⁶ to 200 × 10 ⁶ pieces / m ² (50 to
200 pieces / mm ² ), more preferably 100 × 10 ⁶ to 2
It is desirable to be 00 × 10 ⁶ pieces / m ² (100 to 200 pieces / mm ² ).

The spacer 21 has a particle size distribution (C
V value) is preferably 6% or less, more preferably 3% or less. The CV value is calculated by dividing the standard deviation of the particle size distribution by the average value of the particle size distribution.

In this embodiment, the adhesive particles 24
Spraying density of 10 × 10 ⁶ to 200 × 10 ⁶ pieces / m ² (1
0 to 200 / mm ² ), more preferably 50 × 10 ⁶ to
It is desirable to set it to 150 × 10 ⁶ pieces / m ² (50 to 150 pieces / mm ² ).

In this embodiment, the adhesive particles 24
Having an average particle size of 1.1 to 3 times the average particle size of the spacer 21, and more preferably having an average particle size of 1.5 to 2.5 times the average particle size of the spacer 21. Is desirable.

Further, the particle size distribution (CV
Value) is 20% or less, more preferably the particle size distribution (C
(V value) is preferably 10% or less.

Next, as shown in FIG.
0A is pressed from the outside of the substrate 11 and the counter substrate 12, so that the height (in the vertical direction in the drawing) of the adhesive particles 24 is substantially equal to the diameter of the spacer 21, and then the liquid crystal cell 10A is heated to a predetermined temperature. Then, the substrate 11 and the counter substrate 12 are bonded and fixed via the bonding particles 24 by lowering the temperature to room temperature.

When the adhesive particles 24 are made of a thermosetting adhesive, when the liquid crystal cell 10A is heated to a predetermined temperature,
The substrate 11 and the counter substrate 12 are bonded and fixed via the bonding particles 24 by melting and curing the bonding particles 24 once.

When the adhesive particles 24 are made of a thermoplastic adhesive, when the liquid crystal cell 10A is heated to a predetermined temperature, the adhesive particles 24 are once melted, and then when the liquid crystal cell 10A is returned to room temperature. Then, the adhesive particles 24 solidify,
The substrate 11 and the counter substrate 12 are bonded and fixed.

In this embodiment, the pressing of the adhesive particles 24 and the adhesion and fixing of the substrate 11 and the counter substrate 12 by the adhesive particles 24 may be performed in the same step. In this case,
While pressing the liquid crystal cell 10A from outside the substrate 11 and the counter substrate 12, the liquid crystal cell 10A is heated to a predetermined temperature,
By lowering the temperature to room temperature, the height of the adhesive particles 24 can be made substantially equal to the diameter of the spacer 21, and the substrate 11 and the counter substrate 12 can be bonded and fixed via the adhesive particles 24.

In the same step as the step of bonding and fixing the substrate 11 and the counter substrate 12 via the bonding particles 24, or in another step, the uncured sealing material 14A is cured to form the sealing material 14.

The pressing of the adhesive particles 24, the adhesive fixing of the substrate 11 and the counter substrate 12 by the adhesive particles 24, and the curing of the uncured sealing material 14A are performed by the adhesive particles 24 and the uncured sealing material 14A. It is performed appropriately according to the properties of the adhesive used as the material.

Hereinafter, pressure on the adhesive particles 24, adhesion and fixing of the substrate 11 and the counter substrate 12 by the adhesive particles 24,
An example of a method for curing the uncured sealing material 14A will be described. The present invention is not limited to the method described below.

When the uncured sealing material 14A is made of a thermosetting adhesive, pressure is applied to the adhesive particles 24, the substrate 11 and the opposing substrate 12 are bonded and fixed by the adhesive particles 24, and the uncured seal is formed. The curing of the material 14A can be performed in the same step. In this case, the liquid crystal cell 10A is
And the liquid crystal cell 10 while applying pressure from outside the counter substrate 12.
By heating A to a predetermined temperature and lowering the temperature to room temperature, pressure is applied to the bonding particles 24, bonding and fixing of the substrate 11 and the opposing substrate 12 by the bonding particles 24, and curing of the uncured sealing material 14A Can be performed in the same step.

On the other hand, when the uncured sealing material 14A is made of a photocurable adhesive, the liquid crystal cell 10A is
By irradiating the uncured sealing material 14A with ultraviolet light or the like while applying pressure from the outside of the counter substrate 12, pressure is applied to the adhesive particles 24 and the uncured sealing material 14A is cured. By heating 10A to a predetermined temperature and lowering the temperature to room temperature, the substrate 11 and the counter substrate 12 can be bonded and fixed via the bonding particles 24.

When the uncured sealing material 14A is made of a photo-curable adhesive, the liquid crystal cell 10A is
While applying pressure from the outside of the counter substrate 12, the liquid crystal cell 10A
Is heated to a predetermined temperature, and the temperature is lowered to room temperature, thereby pressing the adhesive particles 24 and bonding and fixing the substrate 11 and the opposing substrate 12 via the adhesive particles 24. Irradiation with ultraviolet rays or the like may cure the uncured sealing material 14A.

After pressing the adhesive particles 24, bonding and fixing the substrate 11 and the opposing substrate 12 by the adhesive particles 24, and curing the uncured sealing material 14A, a vacuum injection method is applied to the inside of the liquid crystal cell 10A. A liquid crystal layer 13 is formed by injecting a liquid crystal by using the method described above, and finally, an optical element such as a retardation plate or a polarizing plate is attached to the outside of the substrate 11 and the counter substrate 12, thereby manufacturing the liquid crystal device 10.

In the method for manufacturing the liquid crystal device 10 described above, the method for manufacturing the liquid crystal device 10 from the substrate 11 and the counter substrate 12 has been described. However, in order to mass-produce the liquid crystal device 10, the liquid crystal device 10 11, counter substrate 12
Is desirably manufactured using two substrate base materials from which a plurality of substrates can be cut out.

Hereinafter, an example of a method for manufacturing the liquid crystal device 10 from two substrate base materials will be described with reference to FIGS. 6 (a) to 6 (d), 7 (a) and 7 (b). 6 (a) to 6 (d), FIG. 7 (a),
(b) shows a schematic plan view. In FIG. 6 and FIG. 7, the scale of each layer and each member is different from the actual scale in order to make each layer and each member have a size that can be recognized in the drawings. The method of manufacturing the liquid crystal device 10 shown in FIGS. 6 and 7 is an example, and the present invention is not limited to this.

In order to perform mass production and shorten the production process, the liquid crystal device 10 is opposed to a substrate base material 41 shown in FIG. It is manufactured by using a counter substrate base material 42 shown in FIG. 6B and having a size capable of cutting out a plurality of substrates 12.

In the substrate preform 41 and the opposing substrate preform 42, regions that are cut and finally become the substrate 11 and the opposing substrate 12 are referred to as a substrate forming region 11a and an opposing substrate forming region 12a, respectively. FIGS. 6A and 6B show, as an example, a substrate base material 41 and a counter substrate base material 42 in a case where four substrate formation regions 11a and four counter substrate formation regions 12a are provided.

Although not shown in the drawing, a color filter 15, a protective film 16, an electrode 17, and an alignment film 19 are sequentially laminated on each substrate forming region 11a of the substrate preform 41. Although not shown in the drawing, the electrode 18 and the alignment film 20 are sequentially formed in each counter substrate forming region 12 a of the counter substrate base material 42.

Next, as shown in FIG.
1. The uncured sealing material 14A is printed on the periphery of each substrate forming region of one substrate preform of the opposing substrate preform 42, and is applied to each substrate forming region of the same substrate preform or the other substrate preform. After the spacers 21 and the adhesive particles 24 are sprayed, the uncured sealing material 1
The liquid crystal cell base material 43 is formed by sticking via the 4A. In FIG. 6C, reference numeral 10A indicates an individual liquid crystal cell. Note that the conditions for dispersing the spacers 21 and the adhesive particles 24 have been described above, and will not be described.

Next, in the liquid crystal cell base material 43, pressure is applied to the adhesive particles 24, the substrate base material 41 and the opposing substrate base material 42 are bonded and fixed by the adhesive particles 24, and the uncured sealing material 1 is used.
4A is cured. Pressurizing the adhesive particles 24, bonding and fixing the substrate 11 and the counter substrate 12 with the adhesive particles 24,
Since the method of curing the uncured sealing material 14A has been described in detail above, the description is omitted.

Next, as shown in FIG. 6D, the liquid crystal cell base material 43 is cut so that the injection hole 22 is located at the end.
A plurality of liquid crystal cells 10A form a strip-shaped liquid crystal cell base material 44 in which the liquid crystal cells 10A are arranged in a row in the horizontal direction in the drawing.

Next, as shown in FIG.
After injecting liquid crystal into each liquid crystal cell 10A from above, and forming the liquid crystal layer 13 in each liquid crystal cell 10A of the liquid crystal cell base material 44,
The liquid crystal injection hole 22 is sealed with a sealing material 23.

Next, as shown in FIG. 7B, the liquid crystal cell base material 44 is divided into each substrate forming region 11a and each counter substrate forming region 1
By cutting along the outer peripheral part of 2a, it cuts for each liquid crystal cell 10A. Thus, the substrate 11 and the opposing substrate 12 are cut out. Finally, the liquid crystal device 10 is manufactured by attaching optical elements such as a retardation plate and a polarizing plate to the outside of the substrate 11 and the counter substrate 12.

According to the present embodiment, by optimizing the conditions for dispersing the spacers 21 and the adhesive particles 24, the cell gap can be made uniform even when a liquid crystal device using a plastic film substrate is manufactured. It is possible to provide a method of manufacturing a liquid crystal device that can prevent generation of bubbles in the liquid crystal layer 13 at a low temperature and can improve display quality.

The liquid crystal device 10 manufactured by the method of manufacturing a liquid crystal device according to the present embodiment has a uniform cell gap, prevents generation of bubbles in the liquid crystal layer 13 at a low temperature, and has excellent display quality. It will be.

In the present embodiment, only a simple matrix type liquid crystal device has been described. However, the present invention is not limited to this, and a TFD (Thin Film Diode) may be used.
ode) elements and TFTs (Thin-Fi)
The present invention can be applied to any liquid crystal device such as an active matrix type liquid crystal device using a three-terminal element represented by an lm transistor element.

Next, a specific example of an electronic apparatus including the liquid crystal device 10 manufactured according to the above embodiment will be described.

FIG. 8A is a perspective view showing an example of a portable telephone. In FIG. 8A, reference numeral 300 denotes a mobile phone main body, and reference numeral 301 denotes a liquid crystal display unit including the liquid crystal device 10 described above.

FIG. 8B is a perspective view showing an example of a portable information processing device such as a word processor or a personal computer. Fig. 8 (b)
In the figure, 400 is an information processing apparatus, 401 is an input unit such as a keyboard, 403 is an information processing main body, and 402 is a liquid crystal display unit having the liquid crystal device 10.

FIG. 8C is a perspective view showing an example of a wristwatch-type electronic device. In FIG. 8C, reference numeral 500 denotes a watch main body, and reference numeral 501 denotes a liquid crystal display unit including the liquid crystal device 10 described above.

Each of the electronic devices shown in FIGS. 8A to 8C has the above-described liquid crystal device 10 and therefore has excellent display quality.

[0106]

Embodiments of the present invention will be described below in detail.

Thickness 0.2 based on polycarbonate
A simple matrix type liquid crystal device was manufactured using a plastic film substrate of × 10 ⁻³ m (0.2 mm) by the method of manufacturing a liquid crystal device described in the embodiment.
The number of pixels was 64 dots vertically and 64 dots horizontally, and the pixel pitch was 0.5 × 10 ⁻³ m (0.5 mm).

The spacer was made of silicon dioxide, and the adhesive particles were made of an epoxy-based thermosetting adhesive.

Table 1 shows the standard conditions for spraying spacers and adhesive particles in the manufacturing process of the liquid crystal device. In Table 1, the particle size distribution (CV value) indicates a value obtained by dividing the standard deviation of the particle size distribution by the average value of the particle size distribution.

[0110]

[Table 1]

Hereinafter, only one of the standard conditions shown in Table 1 was changed, and the other conditions were used to manufacture a liquid crystal device under the conditions shown in Table 1, and the characteristics of the manufactured liquid crystal device were examined. The conditions at the time of performing and the obtained result are shown.

The variation in the cell gap of the liquid crystal device was 0.1 × 10 ⁻⁶ m (0.1 μm) because a liquid crystal device having excellent display quality without any display unevenness was obtained.
m) The following is an ideal value: 0.15 ×
The allowable range was about 10 ⁻⁶ m (0.15 μm) or less.

(Spraying Density of Spacer) The conditions other than the spraying density of the spacers when spraying the spacers and the adhesive particles were as shown in Table 1, and only the spraying density of the spacers was set to various values to set the liquid crystal device. Was manufactured.

FIG. 9 shows the relationship between the distribution density of the spacers and the variation in the cell gap of the manufactured liquid crystal device.

Also, the manufactured liquid crystal device was kept at -30 ° C. for 2 hours.
It was left for 4 hours, and it was inspected whether bubbles were generated in the liquid crystal layer. Regardless of the size of the liquid crystal layer, at least one bubble was generated as a defective product, and 200 liquid crystal devices were inspected to calculate the defective product occurrence rate. This reject rate is defined as the low-temperature bubble rate. FIG. 10 shows the relationship between the spacer spray density and the low-temperature bubble generation rate of the manufactured liquid crystal device.

As shown in FIG. 9, the dispersion of the cell gap of the liquid crystal device increases as the distribution density of the spacers decreases.
^When it is less than ⁶ cells / m ² (50 cells / mm ² ), the cell gap variation of the liquid crystal device rapidly increases, and the allowable range of the cell gap variation is 0.15 × 10 ⁻⁶ m (0.1
5 μm).

Further, the scatter density of the spacer was set to 100 × 1.
0 ⁶ / m ² by a (100 / mm ²⁾ or more, 0.1 × ideal cell gap of the liquid crystal device 10 ^-6 m
(0.1 μm) or less.

On the other hand, as shown in FIG. 10, the scatter density of the spacer was 200 × 10 ⁶ pieces / m ² (200 pieces / mm ² ).
If it is less than 0, the low-temperature bubble generation rate was 0%, but the scattering density of the spacer was 200 × 10 ⁶ pieces / m ² (200 pieces / mm
^{When 2} ) was exceeded, it was shown that the low-temperature bubble generation rate rapidly increased.

From the above results, it was found that the density of the spacer
50 × 10⁶~ 200 × 10⁶Pieces / m ^Two(50-200 pieces
/ Mm^Two), More preferably 100 × 10⁶~ 200 × 1
0⁶Pieces / m^Two(100-200 pieces / mm^Two)
It turned out to be desirable.

(Particle Particle Size Distribution) Conditions other than the spacer particle size distribution when spraying the spacers and the adhesive particles were as shown in Table 1, and only the spacer particle size distribution was set to various values. To manufacture a liquid crystal device.

FIG. 1 shows the relationship between the particle size distribution (CV value) of the spacer and the variation in the cell gap of the manufactured liquid crystal device.
1 is shown.

As shown in FIG. 11, as the particle size distribution (CV value) of the spacer increases, the variation in the cell gap of the liquid crystal device increases, but the particle size distribution (CV value) of the spacer exceeds 6%. It has been shown that the variation of the cell gap of the liquid crystal device suddenly increases and greatly exceeds the allowable range of the variation of the cell gap of about 0.15 × 10 ⁻⁶ m (0.15 μm).

By setting the particle size distribution (CV value) of the spacer to 3% or less, the cell gap of the liquid crystal device can be reduced to an ideal 0.1 × 10 ⁻⁶ m (0.1 μm) or less. It has been shown.

From the above results, it was found that the particle size distribution (CV value) of the spacer was desirably 6% or less, more preferably 3% or less.

(Spray Density of Adhesive Particles) The conditions other than the spray density of the adhesive particles when spraying the spacers and the adhesive particles were the conditions shown in Table 1, and only the spray density of the adhesive particles was set to various values. To manufacture a liquid crystal device.

FIG. 12 shows the relationship between the scattering density of the adhesive particles and the variation in the cell gap of the manufactured liquid crystal device.

Also, the manufactured liquid crystal device was kept at -30 ° C. for 2 hours.
It was left for 4 hours, and it was inspected whether bubbles were generated in the liquid crystal layer. Regardless of the size of the liquid crystal layer, one in which even one bubble was generated was regarded as a defective product, and 200 liquid crystal devices were inspected to calculate a low-temperature bubble generation rate. This reject rate is defined as the low-temperature bubble rate. FIG. 13 shows the relationship between the scattering density of the adhesive particles and the low-temperature bubble generation rate of the manufactured liquid crystal device.

As shown in FIG. 12, the dispersion of the cell gap of the liquid crystal device increases as the scattering density of the adhesive particles decreases, but the scattering density of the adhesive particles is 10 × 10 ^6.
When the number is less than 10 / m ² (10 / mm ² ), the variation of the cell gap of the liquid crystal device rapidly increases, and the allowable range of the variation of the cell gap is 0.15 × 10 ⁻⁶ m (0.15 × 10 ⁶ / m ² ).
μm).

In addition, the scattering density of the adhesive particles was set to 50 × 10 ⁶
Cells / m ² (50 / mm ² ) or more, the cell gap of the liquid crystal device is set to an ideal 0.1 × 10 ⁻⁶ m (0.1
μm).

On the other hand, as shown in FIG. 13, when the scattering density of the adhesive particles was less than 150 × 10 ⁶ particles / m ² (150 particles / mm ² ), the low-temperature bubble generation rate was 0%. Spray density of 150 × 10 ⁶ pieces / m ² (150 pieces / mm ² )
, The low-temperature bubble generation rate gradually increases, and 200 ×
It was shown that when the density exceeds 10 ⁶ / m ² (200 / mm ² ), the low-temperature bubble generation rate sharply increases.

From the above results, it was found that the scattering density of the adhesive particles was 1
0 × 10 ⁶ to 200 × 10 ⁶ pieces / m ² (10 to 200 pieces /
mm ² ), more preferably 50 × 10 ^{6 to} 150 × 10 ⁶
It has been found that it is desirable to make the number of pieces / m ² (50 to 150 pieces / mm ² ).

(Average Particle Size of Adhesive Particles) Conditions other than the average particle size of the adhesive particles when the spacers and the adhesive particles were sprayed were the conditions shown in Table 1, and only the average particle size of the adhesive particles was varied. And the liquid crystal device was manufactured.

FIG. 14 shows the relationship between the ratio of the average particle diameter of the adhesive particles to the average particle diameter of the spacer (adhesive particle diameter / spacer diameter) and the variation in the cell gap of the entire manufactured liquid crystal device.
Shown in

The ratio of the average particle diameter of the adhesive particles to the average particle diameter of the spacer (adhesive particle diameter / spacer diameter) and the vicinity of the adhesive particles of the manufactured liquid crystal device (50 × 10
FIG. 15 shows the relationship with the cell gap variation of ^-6 m (within 50 μm).

As shown in FIG. 14, when the average particle size of the adhesive particles is less than 1.1 times the average particle size of the spacer, the variation in the cell gap of the entire liquid crystal device rapidly increases, and the variation in the cell gap is allowed. Range of 0.15 × 10 ^-6
m (0.15 μm).

By setting the average particle size of the adhesive particles to be 1.5 times or more the average particle size of the spacers, the dispersion of the cell gap of the entire liquid crystal device can be reduced to an ideal 0.1 × 10 ⁻⁶ m.
(0.1 μm) or less.

On the other hand, as shown in FIG. 15, when the average particle size of the adhesive particles is larger than three times the average particle size of the spacer, the variation in the cell gap near the adhesive particles of the liquid crystal device is within the allowable range of 0.15. × 10 ⁻⁶ m (0.15 μm)
It was shown to exceed the degree.

By setting the average particle size of the adhesive particles to 2.5 times or less of the average particle size of the spacer, the cell gap near the adhesive particles of the liquid crystal device is also ideally 0.1 × 10 ⁻⁶ m.
(0.1 μm) or less.

From the above results, it is desirable that the average particle size of the adhesive particles be 1.1 to 3 times, more preferably 1.5 to 2.5 times the average particle size of the spacer. found.

(Particle Size Distribution of Adhesive Particles) Conditions other than the particle size distribution of the adhesive particles at the time of spraying the spacers and the adhesive particles were the conditions shown in Table 1, and only the particle size distribution of the adhesive particles was various values. And the liquid crystal device was manufactured.

FIG. 16 shows the relationship between the particle size distribution of the adhesive particles and the variation in the cell gap of the manufactured liquid crystal device.

As shown in FIG. 16, as the particle size distribution (CV value) of the adhesive particles increases, the variation in the cell gap of the liquid crystal device increases.
(V value) exceeds 20%, the cell gap variation of the liquid crystal device sharply increases, and may greatly exceed the allowable range of the cell gap variation of about 0.15 × 10 ⁻⁶ m (0.15 μm). Indicated.

The particle size distribution (CV value) of the adhesive particles was 1
It was shown that by setting the content to 0% or less, the cell gap of the liquid crystal device can be reduced to 0.1 × 10 ⁻⁶ m (0.1 μm) or less.

From the above results, the particle size distribution of the adhesive particles (C
V value) is desirably 20% or less, more preferably 10% or less.

The above is the result of a study using a plastic film substrate having a thickness of 0.2 × 10 ⁻³ m (0.2 mm) using polycarbonate as a base material. Similar results can be obtained when using a plastic film substrate having a thickness of 0.4 × 10 ⁻³ m (0.4 mm) or less based on polyethylene terephthalate, polyether sulfone, acrylic resin, or polyimide. Have confirmed.

[0146]

As described above, according to the present invention, the cell gap can be made uniform even when manufacturing a liquid crystal device using a plastic film substrate by optimizing the conditions for dispersing the spacer and the adhesive particles. It is possible to provide a method of manufacturing a liquid crystal device which can prevent generation of bubbles in the liquid crystal layer at a low temperature and can improve display quality.

Further, according to this method of manufacturing a liquid crystal device, a liquid crystal device and an electronic apparatus having excellent display quality can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing the structure of a simple matrix type liquid crystal device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a simple matrix type liquid crystal device according to an embodiment of the present invention when viewed from an upper substrate side.

FIG. 3 is a schematic plan view showing a structure of a lower substrate of a simple matrix type liquid crystal device according to an embodiment of the present invention.

FIG. 4 is a schematic plan view showing the structure of an upper substrate of a simple matrix type liquid crystal device according to an embodiment of the present invention.

FIGS. 5A and 5B are process diagrams showing a method for manufacturing a simple matrix type liquid crystal device according to an embodiment of the present invention.

FIGS. 6A to 6D are process diagrams illustrating a method for manufacturing a simple matrix type liquid crystal device according to an embodiment of the present invention.

FIGS. 7A and 7B are process diagrams showing a method of manufacturing a simple matrix type liquid crystal device according to an embodiment of the present invention.

8A is a diagram illustrating an example of a mobile phone including the liquid crystal device according to the embodiment, and FIG. 8B is an example of a portable information processing device including the liquid crystal device according to the embodiment. FIG. 8C is a diagram illustrating an example of a wristwatch-type electronic device including the liquid crystal device of the above embodiment.

FIG. 9 is a diagram showing the relationship between the distribution density of spacers and the variation of the cell gap of the liquid crystal device in the example according to the present invention.

FIG. 10 shows an embodiment according to the present invention.
FIG. 4 is a diagram illustrating a relationship between a spray density of a spacer and a low-temperature bubble generation rate of a liquid crystal device.

FIG. 11 shows an embodiment according to the present invention.
FIG. 4 is a diagram illustrating a relationship between a particle size distribution of a spacer and a variation in a cell gap of a liquid crystal device.

FIG. 12 shows an embodiment according to the present invention.
FIG. 4 is a diagram illustrating a relationship between a scattering density of adhesive particles and a variation in a cell gap of a liquid crystal device.

FIG. 13 shows an embodiment according to the present invention.
FIG. 4 is a diagram illustrating a relationship between a scattering density of adhesive particles and a low-temperature bubble generation rate of a liquid crystal device.

FIG. 14 shows an embodiment according to the present invention.
The ratio between the average particle size of the adhesive particles and the average particle size of the spacer,
FIG. 6 is a diagram illustrating a relationship with a variation in a cell gap of the entire liquid crystal device.

FIG. 15 shows an embodiment according to the present invention.
The ratio between the average particle size of the adhesive particles and the average particle size of the spacer,
FIG. 4 is a diagram illustrating a relationship with a variation in a cell gap near an adhesive particle of a liquid crystal device.

FIG. 16 shows an embodiment according to the present invention.
FIG. 4 is a diagram illustrating a relationship between a particle size distribution of adhesive particles and a variation in a cell gap of a liquid crystal device.

FIG. 17 is a schematic sectional view showing the structure of a conventional simple matrix type liquid crystal device.

FIG. 18 is a schematic plan view showing the structure of a conventional simple matrix type liquid crystal device.

[Explanation of symbols]

Reference Signs List 10 liquid crystal (display) device 10A liquid crystal cell 11 substrate (lower substrate) 12 counter substrate (upper substrate) 13 liquid crystal layer 14 sealing material 14A uncured sealing material 15 color filter 15A coloring layer 15B light shielding layer (black matrix) 16 protection Film 17, 18 Electrode 17a, 18a Leading wiring 19, 20 Alignment film 21 Spacer 24 Adhesive particle 22 Injection hole 23 Sealant 30 Display area (pixel area) 31a, 31b, 32 Leading wiring area 34 Conducting member 35 Lower side External connection terminal portion for electrode 36 External connection terminal portion for upper electrode 41 Substrate base material 42 Counter substrate base material 43, 44 Liquid crystal cell base material 11a Substrate formation region 12a Counter substrate formation region

Continued on front page F-term (reference) 2H089 LA05 LA07 LA11 LA19 LA20 MA01X MA03X NA09 NA40 NA45 NA48 QA06 QA14 TA01 TA06 TA09 TA12 2H090 JB03 JC17 LA02 5C094 AA42 AA43 AA55 BA43 CA19 CA24 EB01 EC03 EC10 FB01 FB15 GB01 CC01 HH14 KK05

Claims (22)

[Claims] A first substrate and a second substrate which are opposed to each other with a liquid crystal layer interposed therebetween, are adhered at a predetermined interval via a sealing material, and the first substrate and the second substrate are adhered to each other; A method for manufacturing a liquid crystal device, comprising a spacer and adhesive particles made of a thermosetting adhesive or a thermoplastic adhesive, between the substrate and the first substrate, wherein a predetermined surface is provided on the surface of the first substrate. Spraying the spacer having a particle size distribution at a predetermined spray density; and having a predetermined average particle size larger than the average particle size of the spacer on the surface of the first substrate, Dispersing the adhesive particles having a distribution at a predetermined distribution density; forming the sealing material on the surface of the first substrate or the second substrate; and disposing the spacer and the adhesive particles on a surface. And the first substrate and the second substrate A step of forming a liquid crystal cell by sticking through a sealing material, and a step of pressing the liquid crystal cell from outside the liquid crystal cell to make the height of the adhesive particles substantially equal to the diameter of the spacer, Heating the liquid crystal cell to a predetermined temperature and lowering the temperature, thereby bonding and fixing the first substrate and the second substrate via the adhesive particles. Device manufacturing method. A first substrate and a second substrate, which are opposed to each other with a liquid crystal layer interposed therebetween, are adhered at a predetermined interval via a sealing material, and the first substrate and the second substrate are adhered to each other; A method for manufacturing a liquid crystal device, comprising: a spacer and an adhesive particle made of a thermosetting adhesive or a thermoplastic adhesive between the first substrate and the first substrate. Spraying the spacer having a diameter distribution at a predetermined spray density; and having a predetermined average particle diameter larger than the average particle diameter of the spacer on the surface of the first substrate, wherein a predetermined particle diameter distribution is provided. Dispersing the adhesive particles at a predetermined distribution density, comprising: forming the sealing material on the surface of the first substrate or the second substrate; and disposing the spacer and the adhesive particles on a surface. And the first substrate and the second substrate Forming a liquid crystal cell by adhering through a sealing material, and heating the liquid crystal cell to a predetermined temperature while pressing the liquid crystal cell from outside the liquid crystal cell, thereby reducing the height of the adhesive particles. A step of making the diameter substantially equal to the diameter of the spacer and adhering and fixing the first substrate and the second substrate via the adhesive particles. 3. In the step of spraying the spacers, the spray density of the spacers is set to 50 × 10 ^{6 to} 20.
3. The method for manufacturing a liquid crystal device according to claim 1, wherein the density is 0 × 10 ⁶ / m ² (50 to 200 / mm ² ). 4. In the step of spraying the spacer, the spray density of the spacer is 100 × 10 ^{6 to} 2
3. The method for manufacturing a liquid crystal device according to claim 1, wherein the number is set to 00 × 10 ⁶ / m ² (100 to 200 / mm ² ). 5. The method according to claim 1, wherein in the step of spraying the spacer, a spacer having a particle size distribution (CV value) of 6% or less is used as the spacer. Of manufacturing a liquid crystal device. 6. The method according to claim 1, wherein in the step of spraying the spacer, a spacer having a particle size distribution (CV value) of 3% or less is used as the spacer. Of manufacturing a liquid crystal device. 7. In the step of spraying the adhesive particles,
The spray density of the adhesive particles is 10 × 10 ^{6 to} 200 × 1
0 ⁶ / m ² (10 to 200 pieces / mm ²⁾ and a method of manufacturing a liquid crystal device according to any one of claims 1, wherein up to claim 6 to. 8. In the step of spraying the adhesive particles,
The spray density of the adhesive particles is 50 × 10 ^{6 to} 150 × 1
0 ⁶ / m ² (50 to 150 / mm ²⁾ and a method of manufacturing a liquid crystal device according to any one of claims 1, wherein up to claim 6 to. 9. In the step of spraying the adhesive particles,
The adhesive particles have an average particle size of 1.1 of the spacer.
9. The method for manufacturing a liquid crystal device according to claim 1, wherein a material having an average particle diameter of about 3 to 3 times is used. 10. The method according to claim 1, wherein in the step of dispersing the adhesive particles, the adhesive particles having an average particle size of 1.5 to 2.5 times the average particle size of the spacer are used. Any one of claims 1 to 8
13. The method for manufacturing a liquid crystal device according to the above item. 11. The method according to claim 1, wherein, in the step of spraying the adhesive particles, particles having a particle size distribution (CV value) of 20% or less are used as the adhesive particles. 13. The method for manufacturing a liquid crystal device according to the above item. 12. The method according to claim 1, wherein in the step of spraying the adhesive particles, particles having a particle size distribution (CV value) of 10% or less are used as the adhesive particles. 13. The method for manufacturing a liquid crystal device according to the above item. 13. The liquid crystal device according to claim 1, wherein the first substrate and the second substrate are made of a plastic film as a base material. Manufacturing method. 14. A liquid crystal device comprising two substrates disposed so as to face each other with a liquid crystal layer interposed therebetween at a predetermined interval via a sealing material, wherein a predetermined density is provided between the two substrates. And a plurality of spacers having a predetermined particle size distribution and a large number of adhesive particles made of a thermosetting adhesive or a thermoplastic adhesive disposed at a predetermined density. . 15. The density of the spacer is 50 × 10 ^6.
To 200 × 10 ⁶ pieces / m ² (50 to 200 pieces / m 2
The liquid crystal device according to claim 14, wherein m ² ). 16. The spacer having a density of 100 × 10
^{6 to} 200 × 10 ⁶ pieces / m ² (100 to 200 pieces / m 2
The liquid crystal device according to claim 14, wherein m ² ). 17. A particle size distribution (CV value) of the spacer.
The liquid crystal device according to any one of claims 14 to 16, wherein is less than or equal to 6%. 18. The particle size distribution (CV value) of the spacer.
The liquid crystal device according to any one of claims 14 to 16, wherein is less than or equal to 3%. 19. The adhesive particles have a density of 10 × 10 ^{6 to} 200 × 10 ⁶ particles / m ² (10 to 200 particles / mm ² ).
The liquid crystal device according to any one of claims 14 to 18, wherein: 20. The density of the adhesive particles is 50 × 10 ^{6 to} 150 × 10 ⁶ particles / m ² (50 to 150 particles / mm ² )
The liquid crystal device according to any one of claims 14 to 18, wherein: 21. The liquid crystal device according to claim 14, wherein the two substrates are made of a plastic film as a base material. 22. An electronic apparatus comprising the liquid crystal device according to claim 14. Description: